The UK telecoms industry is undergoing the largest transformation for decades, as the traditional telephone landlines are gradually being phased out. By 2025, BT Openreach aim to have the legacy copper telephone network switched off in place of full fibre.

The PSTN switch off means that all businesses that use outdated telephone lines, will need to have switched to fibre by this time. Is your business still using a traditional phone system? Read on to find out what the switch off means for your business and how you can best prepare.



What is the PSTN and ISDN switch-off?

The switch-off refers to the discontinuation of the traditional Public Switched Telephone Network (PSTN) and Integrated Services Digital Network (ISDN) lines. These legacy systems have served businesses and the country for decades, but advancements in technology and the demand for faster, more flexible communication solutions have rendered them outdated.


Why are BT Openreach turning off the PSTN lines?

BT Openreach, is phasing out the PSTN lines to make way for a modern, IP (Internet Protocol) network. The move aligns with global trends towards IP-based communications and paves the way for new technologies such as Voice over Internet Protocol (VoIP) and cloud-based telephony.


When will PSTN be Switched off?

BT Openreach has set the final date for the ISDN switch-off as December 2025. This gives businesses a few years to plan and adapt to the changing landscape. However, it is crucial not to delay preparations, as upgrading your telephony infrastructure and migrating relevant IT services can take time and consideration.


What does this mean for businesses?

The ISDN switch-off has several implications for businesses. First and foremost, it means that traditional analogue and digital telephone lines will no longer be available. If your business still relies on these legacy systems, it is essential to start considering alternative solutions to ensure uninterrupted communication and continuity.

Secondly, the switch-off provides an opportunity to embrace more advanced communication technologies. VoIP, for instance, allows businesses to make calls over the internet, offering cost savings, flexible features, and seamless integration with other digital tools. Cloud-based telephony solutions further enhance mobility, scalability, and collaboration possibilities.


What should I do to prepare for the switch-off?

To prepare your business for the ISDN switch-off, we’ve been advising businesses to:

  1. Assess your current telephony infrastructure: Understand which services and systems rely on ISDN and PSTN lines.

  3. Consult with a trusted telecoms provider: Engage with an experienced telecoms and managed service provider like Citytalk, who can analyse your requirements and recommend suitable alternatives.

  5. Plan the migration: Create a roadmap for migrating your telephony services to modern, IP-based solutions. This may involve selecting a VoIP provider, assessing network readiness, and considering potential integration with other business systems.

  7. Review your connectivity options: Evaluate your internet connectivity to ensure it can handle the increased data traffic that comes with VoIP and cloud-based telephony. Citytalk can provide products and support in this area.

  9. Train and educate your staff: Prepare your employees for the switch to new telephony systems by providing training and support. Familiarise them with the features and benefits of the chosen solution to maximise productivity.

  11. Test and optimise: Before fully transitioning, conduct thorough testing and optimise your new telephony solution to ensure a smooth and seamless switchover.

5 reasons to choose Citytalk to futureproof your business

As an experienced telecoms and managed service provider, Citytalk is the ideal partner to help future-proof your business in the face of the switch-off. Here’s why:

  1. Expertise and Experience

    With years of experience in the telecoms industry, we understand the evolving tech landscape and can provide tailored solutions to meet your specific needs. Our team of experts stay updated on the latest technologies and industry trends, ensuring you receive cutting-edge advice and support.

  2. Comprehensive Solutions

    Citytalk offers a wide range of services to assist you throughout the migration process. From assessing your current infrastructure to designing and implementing a robust IP-based telephony system, we cover every aspect of your communication needs. Our solutions are scalable, customisable, and designed to enhance productivity and efficiency.

  3. Seamless Transition

    We understand that a smooth transition is essential for your business operations. Citytalk will carefully plan and execute the migration, minimising disruptions and downtime. Our team will handle the technical aspects, including number porting, equipment installation, and network configuration, leaving you free to focus on your core business.

  4. Future-Proofing Your Communication

    By partnering with Citytalk, you gain access to advanced communication technologies that will support your business’s growth and evolution. Our VoIP and cloud-based telephony solutions offer flexibility, scalability, and innovative features that go beyond traditional telephony. We will work closely with you to customise a solution that meets your unique requirements and positions your business for success.

  5. Ongoing Support

    At Citytalk, we prioritise long-term partnerships and provide continuous support even after the transition is complete. Our dedicated support team is available to address any queries, resolve issues promptly, and ensure your communication systems operate seamlessly.


Get in touch with Citytalk

The ISDN switch-off represents a significant milestone in the telecoms industry, requiring businesses to adapt and embrace modern communication technologies. By partnering with a trusted provider like Citytalk, you can navigate this transition smoothly, future-proof your business, and unlock the benefits of advanced telephony solutions.

Don’t wait until it’s too late—start preparing your business today to ensure uninterrupted communication and stay ahead of the curve. Head to our contact page to speak to a member of the Citytalk team.